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  2. Source–sink dynamics - Wikipedia

    en.wikipedia.org/wiki/Sourcesink_dynamics

    Sourcesink dynamics is a theoretical model used by ecologists to describe how variation in habitat quality may affect the population growth or decline of organisms.. Since quality is likely to vary among patches of habitat, it is important to consider how a low quality patch might affect a population.

  3. Sources and sinks - Wikipedia

    en.wikipedia.org/wiki/Sources_and_sinks

    From left to right: a field with a source, a field with a sink, a field without either. In the physical sciences, engineering and mathematics, sources and sinks is an analogy used to describe properties of vector fields. It generalizes the idea of fluid sources and sinks (like the faucet and drain of a bathtub) across different scientific ...

  4. Metapopulation - Wikipedia

    en.wikipedia.org/wiki/Metapopulation

    Huffaker's [4] studies of spatial structure and species interactions are an example of early experimentation in metapopulation dynamics. Since the experiments of Huffaker [4] and Levins, [1] models have been created which integrate stochastic factors. These models have shown that the combination of environmental variability (stochasticity) and ...

  5. Current source density analysis - Wikipedia

    en.wikipedia.org/wiki/Current_source_density...

    While current sources or sinks are abstract elements used for analysis, generally they have physical counterparts in real-world applications; e.g. the anode or cathode in a battery. In all cases, each of the opposing terms (source or sink) may refer to the same object, depending on the perspective of the observer and the sign convention being ...

  6. Biogeochemical cycle - Wikipedia

    en.wikipedia.org/wiki/Biogeochemical_cycle

    The source Q is the flux of material into the reservoir, and the sink S is the flux of material out of the reservoir. The budget is the check and balance of the sources and sinks affecting material turnover in a reservoir. The reservoir is in a steady state if Q = S, that is, if the sources balance the sinks and there is no change over time. [25]

  7. Patch dynamics - Wikipedia

    en.wikipedia.org/wiki/Patch_dynamics

    Patch dynamics became a dominant theme in ecology between the late 1970s and the 1990s. Patch dynamics is a conceptual approach to ecosystem and habitat analysis that emphasizes dynamics of heterogeneity within a system (i.e. that each area of an ecosystem is made up of a mosaic of small 'sub-ecosystems'). [1]

  8. Ecosystem model - Wikipedia

    en.wikipedia.org/wiki/Ecosystem_model

    A structural diagram of the open ocean plankton ecosystem model of Fasham, Ducklow & McKelvie (1990). [1]An ecosystem model is an abstract, usually mathematical, representation of an ecological system (ranging in scale from an individual population, to an ecological community, or even an entire biome), which is studied to better understand the real system.

  9. Oxygen cycle - Wikipedia

    en.wikipedia.org/wiki/Oxygen_cycle

    While there are many abiotic sources and sinks for O 2, the presence of the profuse concentration of free oxygen in modern Earth's atmosphere and ocean is attributed to O 2 production from the biological process of oxygenic photosynthesis in conjunction with a biological sink known as the biological pump and a geologic process of carbon burial involving plate tectonics.

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